1 /*
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
3 *
4 * This code is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 only, as
6 * published by the Free Software Foundation. Oracle designates this
7 * particular file as subject to the "Classpath" exception as provided
8 * by Oracle in the LICENSE file that accompanied this code.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 */
24
25 // This file is available under and governed by the GNU General Public
26 // License version 2 only, as published by the Free Software Foundation.
27 // However, the following notice accompanied the original version of this
28 // file:
29 //
30 /*
31 * Copyright © 2010,2012 Google, Inc.
32 *
33 * This is part of HarfBuzz, a text shaping library.
34 *
35 * Permission is hereby granted, without written agreement and without
36 * license or royalty fees, to use, copy, modify, and distribute this
37 * software and its documentation for any purpose, provided that the
38 * above copyright notice and the following two paragraphs appear in
39 * all copies of this software.
40 *
41 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
42 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
43 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
44 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
45 * DAMAGE.
46 *
47 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
48 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
49 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
50 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
51 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
52 *
53 * Google Author(s): Behdad Esfahbod
54 */
55
56 #include "hb-ot-shape-complex-private.hh"
57
58
59 static bool
60 compose_hebrew (const hb_ot_shape_normalize_context_t *c,
61 hb_codepoint_t a,
62 hb_codepoint_t b,
63 hb_codepoint_t *ab)
64 {
65 /* Hebrew presentation-form shaping.
66 * https://bugzilla.mozilla.org/show_bug.cgi?id=728866
67 * Hebrew presentation forms with dagesh, for characters U+05D0..05EA;
68 * Note that some letters do not have a dagesh presForm encoded.
69 */
70 static const hb_codepoint_t sDageshForms[0x05EAu - 0x05D0u + 1] = {
71 0xFB30u, /* ALEF */
72 0xFB31u, /* BET */
73 0xFB32u, /* GIMEL */
74 0xFB33u, /* DALET */
75 0xFB34u, /* HE */
76 0xFB35u, /* VAV */
77 0xFB36u, /* ZAYIN */
78 0x0000u, /* HET */
79 0xFB38u, /* TET */
80 0xFB39u, /* YOD */
81 0xFB3Au, /* FINAL KAF */
82 0xFB3Bu, /* KAF */
83 0xFB3Cu, /* LAMED */
84 0x0000u, /* FINAL MEM */
85 0xFB3Eu, /* MEM */
86 0x0000u, /* FINAL NUN */
87 0xFB40u, /* NUN */
88 0xFB41u, /* SAMEKH */
89 0x0000u, /* AYIN */
90 0xFB43u, /* FINAL PE */
91 0xFB44u, /* PE */
92 0x0000u, /* FINAL TSADI */
93 0xFB46u, /* TSADI */
94 0xFB47u, /* QOF */
95 0xFB48u, /* RESH */
96 0xFB49u, /* SHIN */
97 0xFB4Au /* TAV */
98 };
99
100 bool found = c->unicode->compose (a, b, ab);
101
102 if (!found && !c->plan->has_mark)
103 {
104 /* Special-case Hebrew presentation forms that are excluded from
105 * standard normalization, but wanted for old fonts. */
106 switch (b) {
107 case 0x05B4u: /* HIRIQ */
108 if (a == 0x05D9u) { /* YOD */
109 *ab = 0xFB1Du;
110 found = true;
111 }
112 break;
113 case 0x05B7u: /* patah */
114 if (a == 0x05F2u) { /* YIDDISH YOD YOD */
115 *ab = 0xFB1Fu;
116 found = true;
117 } else if (a == 0x05D0u) { /* ALEF */
118 *ab = 0xFB2Eu;
119 found = true;
120 }
121 break;
122 case 0x05B8u: /* QAMATS */
123 if (a == 0x05D0u) { /* ALEF */
124 *ab = 0xFB2Fu;
125 found = true;
126 }
127 break;
128 case 0x05B9u: /* HOLAM */
129 if (a == 0x05D5u) { /* VAV */
130 *ab = 0xFB4Bu;
131 found = true;
132 }
133 break;
134 case 0x05BCu: /* DAGESH */
135 if (a >= 0x05D0u && a <= 0x05EAu) {
136 *ab = sDageshForms[a - 0x05D0u];
137 found = (*ab != 0);
138 } else if (a == 0xFB2Au) { /* SHIN WITH SHIN DOT */
139 *ab = 0xFB2Cu;
140 found = true;
141 } else if (a == 0xFB2Bu) { /* SHIN WITH SIN DOT */
142 *ab = 0xFB2Du;
143 found = true;
144 }
145 break;
146 case 0x05BFu: /* RAFE */
147 switch (a) {
148 case 0x05D1u: /* BET */
149 *ab = 0xFB4Cu;
150 found = true;
151 break;
152 case 0x05DBu: /* KAF */
153 *ab = 0xFB4Du;
154 found = true;
155 break;
156 case 0x05E4u: /* PE */
157 *ab = 0xFB4Eu;
158 found = true;
159 break;
160 }
161 break;
162 case 0x05C1u: /* SHIN DOT */
163 if (a == 0x05E9u) { /* SHIN */
164 *ab = 0xFB2Au;
165 found = true;
166 } else if (a == 0xFB49u) { /* SHIN WITH DAGESH */
167 *ab = 0xFB2Cu;
168 found = true;
169 }
170 break;
171 case 0x05C2u: /* SIN DOT */
172 if (a == 0x05E9u) { /* SHIN */
173 *ab = 0xFB2Bu;
174 found = true;
175 } else if (a == 0xFB49u) { /* SHIN WITH DAGESH */
176 *ab = 0xFB2Du;
177 found = true;
178 }
179 break;
180 }
181 }
182
183 return found;
184 }
185
186
187 const hb_ot_complex_shaper_t _hb_ot_complex_shaper_hebrew =
188 {
189 "hebrew",
190 NULL, /* collect_features */
191 NULL, /* override_features */
192 NULL, /* data_create */
193 NULL, /* data_destroy */
194 NULL, /* preprocess_text */
195 HB_OT_SHAPE_NORMALIZATION_MODE_DEFAULT,
196 NULL, /* decompose */
197 compose_hebrew,
198 NULL, /* setup_masks */
199 HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_GDEF_LATE,
200 true, /* fallback_position */
201 };